Bring gcc-4.4.0 to up-to-date.
[asac-android-toolchain:gcc-linaro.git] / gcc-4.4.0 / gcc / testsuite / gcc.dg / vect / wrapv-vect-reduc-dot-s8b.c
1 /* { dg-require-effective-target vect_int } */
2
3 #include <stdarg.h>
4 #include "tree-vect.h"
5
6 #define N 64
7
8 #define DOT -21856
9
10 signed char X[N] __attribute__ ((__aligned__(16))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
11 signed char Y[N] __attribute__ ((__aligned__(16))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1};
12
13 /* char->short->short dot product.
14    The dot-product pattern should be detected.
15    Should be vectorized on vect_sdot_qi targets (targets that support 
16    dot-product of signed char).  
17    This test currently fails to vectorize on targets that support
18    dot-product of chars into and int accumulator.
19    Can also be vectorized as widening-mult + summation,
20    or with type-conversion support.
21  */
22 __attribute__ ((noinline)) short
23 foo(int len) {
24   int i;
25   short result = 0;
26
27   for (i=0; i<len; i++) {
28     result += (X[i] * Y[i]);
29   }
30   return result;
31 }
32
33 int main (void)
34 {
35   int i;
36   short dot;
37
38   check_vect ();
39
40   dot = foo (N);
41   if (dot != DOT)
42     abort ();
43
44   return 0;
45 }
46
47 /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
48 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
49
50 /* When vectorizer is enhanced to vectorize accumulation into short for targets 
51    that support accumulation into int (e.g. ia64) we'd have:
52 dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } }
53 */
54 /* In the meantime expect: */
55 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */
56
57 /* { dg-final { cleanup-tree-dump "vect" } } */